What is the range of this function?

(3,7)(4,0)(–3,4)(–1,9)(–10,–7)

1 answer

To find the range of a set of points representing a function, we list the second components (or \(y\)-values) of each ordered pair. The given points are:

  • (3, 7) → \(y = 7\)
  • (4, 0) → \(y = 0\)
  • (–3, 4) → \(y = 4\)
  • (–1, 9) → \(y = 9\)
  • (–10, –7) → \(y = -7\)

Now, let's extract the \(y\)-values:

  • \(7\)
  • \(0\)
  • \(4\)
  • \(9\)
  • \(-7\)

Now, we can list these values in order and identify the minimum and maximum values:

  • The minimum \(y\)-value is \(-7\).
  • The maximum \(y\)-value is \(9\).

Therefore, the range of the function is:

\[ {-7, 0, 4, 7, 9} \]

So, the range is:

\[-7 \leq y \leq 9\]

Or in interval notation, the range can be represented as:

\[-7 \leq y \leq 9\] or \([-7, 9]\).

In summary, the range of the function is \([-7, 9]\).